rozes.jpg (17205 bytes)


IEEE  PHOTONICS, APS and  MTT/ED  Chapters in Russia Section

Joint Electromagnetic Meeting
Co-Chairs: Prof. Dimitry M. Sazonov,
Prof.  Victor V. Shevchenko, Dr. Sergei P. Skobelev

Address: Mokhovaja str., H 11, IRE RAS, 4-th Floor, Conference-Hall.
Entrance - Free for all people

budgotov.gif (7950 bytes)  

    AGENDA (May 2013 - June 2017)

     

    Tuesday,  June 06,  2017, 15:00 (3:00 p.m.) - Session 5  in 2017 

    1.  Strongly localized plasmons on periodically corrugated metal surface
        Authors: E. D. Chubchev (1), I. A. Nechepurenko (1), F. V. Dorofeenko (1,2),A. P. Vinogradov (1,2),  A. A. Lisyansky (3)

      (1-Dukhov Research Institute for Automatics, Moscow, Russia; 2-Institute for Theoretical and Applied Electromagnetics RAS, Moscow, Russia; 3-The Graduate Center of the City University of New York, USA.) ,   (45 min + 15 min for Q&A)


        
    Abstract:  Pokazano, chto po periodicheski nanostrukturirovannoi` poverkhnosti metalla mogut rasprostraniat`sia dve sil`no lokalizovanny`e mody` plazmonov, dlina volny` kotory`kh opredeliaetsia periodom struktury` i mozhet by`t` na poriadok men`she chem dlinna volny` plazmona, rasprostraniaiushchegosia po rovnoi` poverkhnosti. Chastota rasprostraneniia vy`sokochastotnoi` mody` sootvetstvuet usloviiu, kogda summa dei`stvitel`ny`kh chastei` metalla i die`lektrika bol`she nulia, a drugoi`, nizkochastotnoi`, - men`she nulia. Pri e`tom dlina probega vy`sokochastotnoi` mody` sostavliaet neskol`ko desiatkov dlin sobstvenny`kh voln, a vtoroi` – vsego lish` neskol`ko dlin voln. V traditcionny`kh plazmonny`kh materialakh (Au, Ag) vy`sokochastotnaia moda ne mozhet nabliudat`sia iz-za bol`shikh poter`. Dlia eyo nabliudeniia sleduet ispol`zovat` aliuminii`.
     

    2.  Optodynamics phenomena in moving resonators
        Author:  B. V. Melkumyan ( Moscow University named after S. Yu. Vitte,,  Russia ),     (45 min + 15 min for Q&A)

     

    Tuesday,  May 2,  2017, 15:00 (3:00 p.m.) - Session 4  in 2017 

    1.  Excitation and propagation of Sommerfeld-Zennek surface waves on conductive bare wire, strip and on bounded plane surface in the centimeter range of radio waves
        Authors: K.F,  Sergeichev(1), D.M.  Karfidov1, Yu.E.  Sizov(2), S.E.  Andreev1, V.I.  Zhukov(3)  ( 1-. A.M. Prokhorov General Physics Institute, RAS,,  Moscow, 2 -. OOO "Optosistemy"  Moscow, Troitsk,, 3 - .Moscow State University of Information Technology  MIREA ,  Russia ), (45 min + 15 min for Q&A)


        
    Abstract:  Surface electromagnetic waves (SEW), discovered by Sommerfeld and Zennek more than a century ago in connection with their search for an explanation of transoceanic radio communications, have now again become relevant in photonics problems. Plasmon-polaritons, related to the SEW, have of practical importance for the integration of fiber-optic communication channels with electronic microcircuits. The interest in SEW is due to their ability to propagate with relatively weak attenuation along metallic, graphite, cylindrical and limited conductors, along open waveguides with transverse dimensions smaller and comparable to the wavelength, along conductive plates. Unfortunately, studies of the SEW in the microwave range of radio waves, with rare exceptions in the form of demonstration experiments, have not been carried out. The paper presents the results of experimental studies and analysis of the structure of SEW, their propagation through a single wire, a conductive tape in the centimeter range of radio waves, convenient for modeling open waveguides of optical and terahertz (THz) ranges of electromagnetic radiation.
     

    2.  On propagation of electromagnetic waves over sea surface
        Authors:  V. V.  Akhiyarov (Bauman Moscow State Technical University ,  Russia ),   V. A.  Kaloshin   ( Kotelnikov IRE RAS,  Russia ).   (45 min + 15 min for Q&A)


        
    Abstract:  Using the Fock formula a numerical simulation of transmission coefficient between two antennas, separated by the sa surface, depending on the frequency in short wave range of electromagnetic waves has been conducted . The simulation results of the transmission coefficient taking into account the only Zenneck wave contribution are given. The simulation results are compared with known experimental data.

     

    Tuesday,  April 4,  2017, 15:00 (3:00 p.m.) - Session 3 in 2017 

    1.  Methods of calculating the space-time characteristics of UWB aperture antennas
        Author: S. P. Skulkin (Highest School of Economics, Nizhny Novgorod ,  Russia ), (45 min + 15 min for Q&A)

           Abstract:  Opisan metod rascheta impul`sny`kh polei` aperturny`kh antenn, osnovanny`i` na metode fizicheskoi` optiki i pozvoliaiushchii` v kazhdy`i` moment vremeni svesti integrirovanie po poverkhnosti apertury` k integrirovaniiu po linii. Pokazano primenenie e`togo metoda kak dlia polei` ploskikh apertur razlichnoi` formy` i pri razny`kh raspredeleniiakh polia po aperture. Takzhe rassmatrivaiutsia priamofokusny`e i ofsetny`e zerkal`ny`e antenny` s uchetom poliarizatcii. Opredeleny` optimal`ny`i` razmer zonda i optimal`noe rasstoianie mezhdu antennami pri priamy`kh izmereniiakh parametrov antenn. Opisan metod vosstanovleniia dal`nego impul`snogo polia po rezul`tatam rascheta impul`snogo polia v blizhnei` zone. Pokazano vliianie razmerov oblasti skanirovaniia i rasstoianiia mezhdu antennami na vosstanavlivaemoe dal`nee pole.
     

    2.  Quasi-wave method
        Author: R. L. Evelson (Moscow,  Russia), (45 min + 15 min for Q&A)

    Abstract:  Predlozhen analiticheskii` (asimptoticheskii`) metod resheniia priamy`kh granichny`kh zadach e`lektrodinamiki (GZE`), voznikaiushchikh pri vozbuzhdenii udalyonny`m ogranichenny`m istochnikom sistemy` kvaziploskosloisty`kh sred na osnove polucheniia priblizhyonnogo, no obshchego resheniia uravnenii` Maksvella v kazhdoi` kvaziploskosloistoi` srede.

       

    Tuesday,  March 7,  2017, 15:00 (3:00 p.m.) - Session 2 in 2017 

    1.  Analytical solution to the 1D grating diffraction problem
        Author: A. └. Shcherbakov ( Moscow Institute of Physics and Technology, Dolgoprudny, Moscow Reg.,  Russia ), (45 min + 15 min for Q&A)


        
    Abstract:   The presentation will show that the use of two rigorous techniques in the diffraction theory, namely, the C-method and the modal method, by construction of the modal basis for a diffraction problem delivered by a curvilinear coordinate transformation of the Maxwell’s equations yields a general analytical solution to the 1D grating diffraction problem in the T-matrix form for gratings which profiles are defined by piecewise twice continuously differentiable functions. Moreover, the constructed basis being transformed to the initial coordinate system appears to coincide with the Rayleigh expansion in the grating region.
     .

    Tuesday,  February 7,  2017, 15:00 (3:00 p.m.) - Session 1 in 2017 

    1.  Principles of constructing contiguous ground-based and space-based antenna fields
        Author: V. I. Gusevsky (Design Bureau of the Moscow Power Engineering Institute,, Moscow.,  Russia ), (45 min + 15 min for Q&A)


        
    Abstract:  Rassmatrivaiutsia voprosy`, sviazanny`e s printcipami postroeniia i ispol`zovaniia protiazhenny`kh antenny`kh polei` nazemnogo i kosmicheskogo bazirovaniia, predstavliaiushchikh soboi` fazirovanny`e antenny`e reshetki, sostoiashchie iz raznesenny`kh v prostranstve ostronapravlenny`kh antenn s uvelichenny`mi mezhe`lementny`mi rasstoianiiami. Takie antenny`e sooruzheniia sozdaiutsia v razlichny`kh stranakh i prednaznacheny` dlia resheniia zadach radioastronomicheskogo nabliudeniia i radiolokatcionnogo nabliudeniia v kosmicheskom prostranstve.
     

    2.  On excitation of electromagnetic waves in sea water
        Author: V. A. Atsyukovsky (Zhukovsky, Moscow Region,  Russia ), (45 min + 15 min for Q&A)


        
    Abstract:   Provoditsia opisanie e`ksperimentov po vozbuzhdeniiu i rasprostraneniiu e`lektromagnitny`kh voln v morskoi` vode, provedenny`kh avtorom v kontce 1980-kh godov. Opisanie vcliuchaet osobennosti apparatury`, spetcial`no razrabotannoi` s uchetom vy`sokoi` provodimosti morskoi` vody`, a takzhe poluchenny`e rezul`taty`, v chastnosti kasaiushchiesia dal`nosti priema i glubiny` prohozhdeniia signala. Na osnovanii poluchenny`kh rezul`tatov delaiutsia vy`vody` ob e`ksperimental`nom podtverzhdenii sushchestvovaniia vy`sokochastotny`kh (megagertcy`) prodol`ny`kh voln, sposobny`kh rasprostraniat`sia v pripoverkhnostnom (edinitcy` metrov) sloe morskoi` vody` na desiatki kilometrov. V doclade takzhe obsuzhdaiutsia vozmozhny`e napravleniia i perspektivy` dal`nei`shikh issledovanii` v rassmatrivaemoi` oblasti.
     

    Tuesday,  November 1 ,  2016, 15:00 (3:00 p.m.) - Session 5 in 2016 

    1.  Method of Fundamental Components in the Physical Theory of Diffraction

        Author:  M. V. Vesnik  ( Kotelnikov Institute of Radio Engineering and Electronics RAS, Moscow,  Russia ), (45 min + 15 min for Q&A)


        
    Abstract:   A novel heuristic method of obtaining heuristic solutions for 3D diffraction problems (method of fundamental components) is proposed. This approach has several advantages over the known heuristic methods such as GTD and MEW. The new method proved to be effective in obtaining of heuristic solutions to a number of reference problems, such as diffraction on a perfectly conducting plane angular sector and diffraction on a semi-transparent half-plane. Application of the method provides new possibilities for solving practical problems such as calculation of the radar cross-section, wave propagation in urban areas, location of seismic objects using elastic waves..

     

    Tuesday,  June 7 ,  2016, 15:00 (3:00 p.m.) - Session 3 in 2016 

    1.  The Earth surface illumination by pattern cones of multiple-beam active phased antenna arrays
        Authors:   I.A. Yuskevich (speaker), V.D. Teplyakov, A.S. Petrov (  Company "Yalini Engineering", Omsk,,  Russia ), (45 min + 15 min for Q&A)


        
    Abstract:   A kinematic model of a circular orbit satellite group is presented. An equation for calculation of the number of satellites in the group demanded for the global Earth coverage by onboard antenna systems with conical scan sectors is obtained. A simplified method for calculation of the footprints map on Earth surface formed by the partial radiation patterns of an active electronically scanned array (AESA) is proposed. Equations for calculation of the slant range, elevation angle, coverage zone are given. Numerical examples and graphical illustrations are made to verify the model.
     

    2.  Analysis of multiple beam antenna pattern forming process occurring in analog-digital active phased array antennas
        Authors: V.A. Ruchenkov (speaker), V.D. Teplyakov, A.S. Petrov(Company "Yalini Engineering", Omsk,    Russia ), (45 min + 15 min for Q&A)


        
    Abstract:   Some features of the antenna pattern (AP) forming process occurring in the schemes of active phased array antenna with analog controlling at radiators and digital controlling at sub-aperture level are analyzed. A linear antenna array example have demonstrated that the inter-beam interference takes place at scanning causing AP's distortion and its angle maximums shift with large signal amplitude modulation appearance at inputs of radiators. Some methods to reduce the impact of those effects on the parameters of multiple beam array and to reduce the level of interference lobes in analog-digital beam-forming schematic are recommended.
     

    3.  Filtering property of the antenna array factor
        Authors:  A.S. Petrov (speaker), V.D. Teplyakov  (  Company "Yalini Engineering", Omsk,  Russia ), (45 min + 15 min for Q&A)


        
    Abstract:   Analysis of changes in angular dependence of planar phased array antenna directivity gain at increasing of the number of radiators was carried and revealed it filtering property. With the increase of the number of elements, the angular directivity gain dependence tends to the well known limiting cosine function but nevertheless differs from it at angular regions where antenna pattern has zero value as well as at wave grazing angles relative to the aperture. It was demonstrated that when the radiators are almost omnidirectional then at about the total angular region of scanning the limiting directivity gain behavior was observed already for 4 4 array.


     Tuesday,  April 5 ,  2016, 15:00 (3:00 p.m.) - Session 2 in 2016 
    1.  Eikonal aberrations in axially symmetrical dielectric lenses and problems of optimization
        Authors:  A. S. Venetsky, V. A. Kaloshin  (Kotelnikov Institute of Radio Engineering and Electronics of RAS, Russia ), (45 min + 15 min for Q&A)
        
    Abstract:   The formulas describing distribution of an eikonal to surfaces of an axisymmetric dielectric lens with any focal lengths and the source displaced from focus are received. The formulas take into account three members of eikonal expansion in powers of shift of a source in any direction. The analysis of accuracy of formulas is carried out by comparison of results of calculation of an eikonal on a surface of an aplanatic lens using the the formulas with results of exact geometric optics calculations. Using the found formulas eikonal aberrations are investigated for a source shift, the focal curve equation is received, the condition of astigmatism minimization is derived and the problem of optimization of parameters of an aplanatic lens with one of focuses in infinity and the aberration minimum is solved.
    Tuesday,  February 2,  2016, 15:00 (3:00 p.m.) - Session 1 in 2016 
    1.  Broadband Luneburg lens antennas and feeding network components for wireless communications systems
        Author:  P.O. Afanasiev  (Southern Federal University, Rostov-upon-Don, Russia ), (45 min + 15 min for Q&A)
        
    Abstract:   An analytical solution of the problem of plane wave diffraction by a multi-layered sphere has been proposed. The solution employs separation of variables using Debye potentials. Electric and magnetic fields are expressed as series of associated Legendre functions and spherical Bessel functions. The solution achieved has been used for optimal approximation of a Luneburg lens profile. A combined analytical approach for rough calculation of Luneburg lens antenna far-field pattern has been presented. The method proposed employs techniques of geometrical optics and physical optics and allows to obtain fast results of far-field calculation. A prototype of a Luneburg lens base station antenna has been presented. Radiation characteristics of the antenna have been investigated using an anechoic chamber. The lens presented has been made out of metamaterial which allows to control dielectric permittivity with a high degree of accuracy. The lens provides a fun of 6 beams in the frequency range 698 - 900 MHz and 12 beams in the frequency range 1710 - 2690 MHz. The antenna demonstrates small beam-width variation over the both frequency ranges. It is shown that the antenna presented has isolation between two polarizations less than -30 dB, cross polarization level less than -15 dB; side-lobe level is -15 dB, VSWR = 1.4. Two types of dual-polarized Luneburg lens antenna radiators are presented. In order to provide a small variation of lens antenna beam-width the beam-width of each type of radiator has a special frequency dependency. New designs of broadband power dividers for 8 - 18 GHz and 2 - 18 GHz have been presented. The power dividers are made with symmetrical coupled strip-lines and contain one or more conducting strips placed nearby a resistor. Using this design, the isolation between two ports has been improved and reflection from output ports has been reduced.

    2. Generalized Source Method for rigorous simulation of grating diffraction in the optical band
       Author:  A.A. Shcherbakov (Moscow Institute of Physics and Technology, Dolgoprudny, Moscow Reg., Russia ), (45 min + 15 min for Q&A)
        
    Abstract:   The report will present the Generalized Source Method for rigorous numerical simulation of optical wave linear diffraction on 1D and 2D gratings. The method possesses asymptotically linear complexity, linear computational memory consumption and admits parallelization on vector processors. These properties allow one to efficiently apply the method for solution of diffraction grating simulation and optimizations problems in diffractive and integrated optics.

    Tuesday,  December 1,  2015, 15:00 (3:00 p.m.) - Session 9 in 2015 
    1.  Geometric optical synthesis of beam waveguides with pattern symmetry and zero cross polarization
        Authors:  B. L. Kogan, A. N. Plastikov (Special Research Bureau of the MPEI, Moscow, Russia ), (45 min + 15 min for Q&A)
        
    Abstract:   A geometrical optics method of designing of a dual-reflector beam wave-guide formed by the surfaces of revolution of the second order and free from cross-polarization is presented. The central rays of the beam waveguide are part of an ar-bitrary quadrangular closed beam path. The geometry of the beam waveguide is completely determined by this path. In the particular case of conservation of the beam angular width the Mizusawa’s conditions are satisfied.
     

    Tuesday,  November  3, 2015, 15:00 (3:00 p.m.) - Session 8 in 2015 
    1.  Solution to the problems of wave diffraction on thin screens
        Author:  H. T. Aleroeva, (Moscow Technical University of Telecommunications and Information Science, Moscow, Russia ), (45 min + 15 min for Q&A)
        
    Abstract:    In the present report we develop a method of continued boundary conditions (MCBC) for solving the problem of scattering by thin screens. It includes:

    1) Development of a hybrid algorithm for solving the problem of diffraction of a plane wave on large thin screens compared with the wavelength. The resulting algorithm is compared with the MCBC based on the use of different bases. 2) Application of the MCBC to the wave scattering problems for the screens with the generalized impedance conditions. 3) Application of the MCBC to non-stationary problems of diffraction on thin screens. 4) Application of the MCBC to the problem of diffraction on thin screens located in the areas with metamaterials.


    2.  Synthesis and analysis of constrained polifocal lenses with symmetrical focal curves
        Authors:  V. A. Kaloshin, H. D. Nghiem, (V. A. Kotelnikov IRE RAS,  Moscow,  Russia ), (45 min + 15 min for Q&A)  

    Abstract:  The two-dimensional problem of bifocal, three-focal and four-focal constrained lens synthesis for symmetrical focal curves is solved. Solution of the problem is reduced to the transcendental equation for the lens shape. On the basis of a numerical solution of the equation the optimization of the parameters and the analysis of the eikonal aberrations of the optimized lens are done for two values of angle of view: 60 and 90 degrees. The results of the simulation for the planar four-focal constrained lens with 60 and 90 degrees angle of view are given.

     

    Tuesday,  October  6, 2015, 15:00 (3:00 p.m.) - Session 7 in 2015 
    1.  Screens with antenna radiation pattern cut-off
        Authors:  D. V. Tatarnikov, I. M. Chernetsky, (Moscow Aviation Institute, Moscow, Russia ), (45 min + 15 min for Q&A)
        
    Abstract:   Some opportunities of achieving a cut-off radiation pattern in semi-shadow area of an antenna by supplementing the ground plane with a system of semi-transparent ribs parallel to the main lobe direction are considered. Mathematical models are developed, computer simulation is performed, and the results of simulation are supported by experimental data. It is shown that a cut-off of about 20 dB is achievable. The results are relevant to electromagnetic compatibility, jamming protection, and multipath error mitigation.
    2.  Modeling of the Characteristics of Perfectly Conducting and Impedance Bodies on the Basis of the Method of Auxiliary Currents
        Author: E. S. Negorozhina, (Moscow Technical University of Telecommunications and Information Science,  Moscow,  Russia ), (45 min + 15 min for Q&A)

       Abstract:  The aim of the work was the creation of an effective and universal numerical method for three-dimensional problems of diffraction of electromagnetic waves by single scatterers in a fairly wide range of wave sizes, and by a group of bodies. For this purpose there were used the theoretical foundations of the modified method of auxiliary currents (MMAC). As a result, we developed a generalization of the MMAC and its version - modified method of discrete sources (MMDS) for the problem of diffraction of electromagnetic waves on perfectly conducting bodies and bodies with impedance boundary condition, as well as on a group of impedance bodies of revolution. Modeling of the scattering characteristics on the bodies with non-smooth boundary is also considered. A comparative study of the use of spline bases of various orders for the numerical solution of integral equations by the modified method of auxiliary spline-currents was done. The use of the MMDS for solving diffraction problems in highly prolate and highly oblate bodies with spheroidal coordinates Proposed is proposed. Numerical results for simulated problems characterizing performance of the developed algorithms are presented and discussed.
     

    Tuesday,  September 01, 2015, 15:00 (3:00 p.m.) - Session 6 in 2015 
    1.  Numerical Electromagnetic Analysis of a Huygens Cube
        Authors: K. N. Klimov, A. S. Godin, A. I. Kruglov, A. B. Tsai , (Lianozovo Electromechanical Enterprise, Moscow, Russia ), (45 min + 15 min for Q&A)
        
    Abstract:   Definition and specification of the internal and external Huygens cubes in numerical modeling using universal electromagnetic codes are presented. A numerical solution to an electromagnetic problem for interior Huygens cube obtained with the use of the ASYS HFSS v. 15 code is compared to a known analytic solution. It is shown that, with an increase in frequency, the accuracy of the numerical solution degrades in both the amplitude and phase. The frequency characteristics of the external Huygens cube are numerically simulated and compared with those of the internal Huygens cube. Dependence of the frequency characteristics of the external Huygens cube on the sizes of the air cube is analyzed. Radiation patterns of the external Huygens cube with the edge that is much less than the wavelength, a half of the wavelength, and of the wavelength are given. The dependence of its pattern shape on the boundary condition on the second input is shown. The paradox of the external Huygens cube is noted. The influence of the boundary condition on the unexcited input on its pattern is considered.
     

    2.  Geometric Interpretation of the Synthesis of a Distribution System for Multibeam Phased Array Antennas
        Authors: K. N. Klimov, V. V. Perfil'ev, D. O. Firsov-Shibaev, D. S. Gezha  , (Lianozovo Electromechanical Enterprise,  Moscow,  Russia ), (45 min + 15 min for Q&A)

       Abstract:  A geometric interpretation is proposed for synthesis of a distribution system employed in multi-beam phased antennas array (PAA). Relationships are obtained for the angles of deflections of PAA beams and for optimum positions of the probes of the distribution system. The optimization is performed according to two criteria: the minimum mean deflection and the minimum local deflection. The example of construction of a distribution system is presented. Dependences of the phase errors on the positions of radiators and patterns of an PAA with a sidelobe level not exceeding 40 dB are obtained.
     

    Tuesday,   June 2, 2015, 15:00 (3:00 p.m.) - Session 5 in 2015 
    1.  Smooth transitions in waveguides with infinitely thin edges

        Author: S. E. Bankov, (Institute of Radio Engineering and Electronics of RAS, Moscow, Russia ), (45 min + 15 min for Q&A)
        
    Abstract:  A problem about coupling coefficients of eigen modes of a closed waveguide containing structures with infinitely thin metal conductors is considered. The original structure with thin edges is replaced by a structure with metal cylinders of a finite radius that then approaches zero. Expressions for coupling coefficients of waveguide the eigen modes are obtained as a results of the above mentioned passage to the limit. The proposed approach is developed also for a case of waveguides with TEM - modes. It is demonstrated that in the single mode regime the obtained expressions give the same result as those given by the known theory of transmission lines with variable characteristic impedance. The technique developed above is applied for analysis of a two-dimensional array of TEM horns radiating in the broadside direction. Explanation of the effect of a bi-directional radiation from the array obtained earlier numerically is presented.
    2.  Qualitative analysis of evolution of the electromagnetic field radiated by dipole

        Authors: D. V. Sorokovik and V. A. Permyakov, (NRU  "Moscow Power Engineering Institute",  Moscow,  Russia ), (45 min + 15 min for Q&A)

       Abstract:  Some results of qualitative analysis of the nonstationary electromagnetic field and the power flux density produced by an elementary electric dipole operating in the harmonic and non-harmonic modes as well as by a finite thin dipole operating in the harmonic mode are presented. In the case of pulse excitation, classification of the singular points of the dipole vector field is given, conditions for bifurcation of the field lines are determined, and instantaneous velocities of the dipole field components are analyzed. Nontrivial features of the structure of the dipole near electric field are studied, including the feature that was revealed as long ago as at the end of the XIX century by H. Hertz but has not been interpreted for a long time. Regularities in formation and motion of the singular points of the electromagnetic field of a finite dipole are considered and a relation between trajectories of the singular points and nulls of the radiation pattern is found.


    Tuesday,  May 5,  2015 , 15:00 (3:00 p.m.) - Session 4 in 2015 
    1.  Special session of seminar devoted to memory Prof. Boris Zaharovich Katsenelenbaum. 

      

    Tuesday,  April 7,  2015 , 15:00 (3:00 p.m.) - Session 3 in 2015 
    1.  To the theory of the Sommerfeld's surface wave

    Author: V. V. Shevchenko, (Institute of Radio Engineering and Electronics of RAS, Moscow, Russia ), (45 min + 15 min for Q&A)
    Abstract:  New analytical expressions are obtained for estimation of the group and energetic velocities of the Sommerfeld's surface electromagnetic wave on a cylinder of high conductivity with using models of a metal wire and water stream.
     

    Tuesday, March 3,  2015 , 15:00 (3:00 p.m.) - Session 2 in 2015 
    1.  Some features of the overlapped subarrays built up of beam-forming matrices for shaping flat-topped radiation patterns

    Author:  S. P. Skobelev (Company "Radiophyzika", Moscow, Russia ), (45 min + 15 min for Q&A)
    Abstract:  Comparative analysis of subarray factor shape and array network complexity is carried out for an approach proposed recently for building up linear arrays of overlapped subarrays for limited field of view applications on the basis of beam-forming matrices. It is shown that the flat-topped subarray radiation patterns can be shaped only at the expense of some reduction of the subarray gain at the broadside direction, and the quality of the flat-topped beam shape is almost independent of the number of array modules in a subarray. Evaluation of the array network complexity is proposed and evaluated on the basis of array element use efficiency. Application of the approach to building up planar overlapped subarrays is addressed and some results of optimization of the subarray factor are presented.
     

    Tuesday, February 3, 2015 , 15:00 (3:00 p.m.) - Session 1 in 2015 
    1.  Orthogonal expansions in antenna engineering

    Author:  V. I. Gusevsky, V. E. Bondarev,  (Special Design Bureau of tMPEI-TU, Moscow, Russia ), (45 min + 15 min for Q&A)
    Abstract:  Using the method of aperture orthogonal polynomials developed earlier, we consider the problems of realization of adaptive properties in phased array antennas and reflector antennas with passive scatterers, remote control of partial phase center position in aperture antennas, construction of non-equidistant phased arrays with highly directive radiating elements, as well as the problems of restoring performance of multi-element antennas operating for a long time in repair-unsuitable conditions.
     

     Tuesday,   November 11 ,  2014 , 15:00 (3:00 p.m.) - Session 6 in 2014 
    1.  Study and optimization of ultra wideband TEM horn antennas (PhD thesis)

    Author:  N. A. Efimova (Bogatykh)   (Kotelnikov Institute of Radio Engineering and Electronics of RAS, Moscow, Russia ), (45 min + 15 min for Q&A)
    Abstract:   The aim of this article is to study matching and radiation characteristics of irregular ultra wideband TEM horns. There are two numerical-analytical matching model and four radiation model in the article. In this article you can find comparison of the result of calculation by the presented models and by the FEM to verify the accuracy of the models.
    The proposed models are used for optimization of the irregular TEM horn geometry according to different criteria. This article presents several new designs of the horn antenna. Four of the proposed antenna designs have small size in a given low band limit. Two antenna designs were optimized by shape of the radiation pattern. Also presented are the design of the horn antenna optimized according to two criteria.


    Tuesday, October 07,  2014 , 15:00 (3:00 p.m.) - Session 5 in 2014 
    1.  Phased antenna arrays with sector-shaped element patterns

    Author:  S. P. Skobelev   
      
    (Company Radiophyzika,  Moscow , Russia) ,  (45 min + 15 min for Q&A)
    Abstract:   V rabote izlozhena teoriia i metody` formirovaniia sektorny`kh partcial`ny`kh diagramm napravlennosti, predstavliaiushchikh bol`shoi` interes dlia optimal`nogo proektirovaniia fazirovanny`kh antenny`kh reshetok dlia riada vazhny`kh prakticheskikh prilozhenii`. Predlozhenny`e metody` osnovany` na primenenii diagrammoobrazuiushchikh mnogopoliusnikov, sviazanny`kh dvukhmodovy`kh volnovodov, izluchatelei` s reaktivny`mi nagruzkami, i antenny`kh e`lementov prodol`nogo izlucheniia.. Poslednie vcliuchaiut die`lektricheskie i rebristy`e sterzhni i ikh dvumerny`e analogi, a takzhe provolochny`e direktorny`e antenny`. Izlozheny` chislenny`e metody`, razrabotanny`e dlia analiza i optimizatcii reshetok s ukazanny`mi e`lementami. Privodiatsia mnogochislenny`e rezul`taty`, harakterizuiushchie kak vozmozhnosti razrabotanny`kh chislenny`kh metodov, tak i vozmozhnosti issleduemy`kh struktur po formirovaniiu sektorny`kh diagramm napravlennosti. Nekotory`e rezul`taty` raschetov sravnivaiutsia s danny`mi, poluchenny`mi v rezul`tate izmerenii`.
     

    2.  On-board multibeam antenna arrays for satellite communication systems

    Author:  A. S. Miloserdov  (Moscow Aviation Institute,  Russia) ,  (45 min + 15 min for Q&A)
    Abstract:  V rabote rassmotrena dvukhstupenchataia skhema postroeniia mnogoluchevoi` antennoi` reshetki v vide sistemy` iz mnogoluchevy`kh krupnoaperturny`kh izluchatelei`, pozvoliaiushchaia obespechit` zadanny`i` dlia global`noi` kosmicheskoi` sviazi sektor obzora i trebuemy`e harakteristiki napravlennosti antenny` pri minimal`nom kolichestve izluchatelei`. Provedena optimizatciia harakteristik napravlennosti i geometrii krupnoaperturny`kh izluchatelei`, vy`polnenny`kh na osnove zerkal`ny`kh i linzovy`kh antenn, i opredeleny` parametry` krupnoaperturny`kh izluchatelei`, obladaiushchikh maksimal`ny`m koe`ffitcientom usileniia v zadannom sektore obzora. Provedeny` raschety` po trebuemomu kolichestvu krupnoaperturny`kh izluchatelei` v zavisimosti ot trebuemogo koe`ffitcienta usileniia mnogoluchevoi` antennoi` reshetki. Rasschitany` harakteristiki napravlennosti mnogoluchevy`kh antenny`kh reshetok iz linzovy`kh die`lektricheskikh krupnoapertuny`kh izluchatelei` _X-_ i _Ka_-diapazona chastot. Issledovany` metody` uluchsheniia harakteristik napravlennosti mnogoluchevy`kh antenny`kh reshetok, sostoiashchikh iz krupnoaperturny`kh izluchatelei`.


    Tuesday
    , September 02,  2014 , 15:00 (3:00 p.m.) - Session 4 in 2014
     

    1.  On the propagation of longitudinal high-frequency and low-frequency waves in sea water

    Author:  V. A. Atsukobsky
      
    (Moscow Reg.,, Russia) ,  (45 min + 15 min for Q&A)
    Abstract:   Dynamic forms of the Ostrogradsky-Gauss theorem and the third Maxwell equation are developed. On their basis, there is shown a possibility of developing a communication channel using the longitudinal high-frequency waves in sea water where the Pointing vector and the electric field strength vector are collinear. Appropriate equipment was developed and experiments were carried out in the Black Sea water confirmed the theoretical statements. The difficulties of matching the receiving equipment inputs in the sea water at 1 GHz were revealed and overcome. There were obtained results confirming radio communication at 10 km distance in a sub-surface layer at the depth down to 3 m at practically total absence of the signal at great depths and in the air. There were developed the grounds of propagating the high-frequency and low-frequency electric waves in sea water with the exception of the near zone.

     

    2.  On the relations between the structures of non-stationary electromagnetic fields and the structures of the exterior sources

    Author:  V. A. Permyakov (Moscow Power Engineering Institute , Russia) ,  (45 min + 15 min for Q&A)
    Abstract:  In June 2012, representation of the electromagnetic field described by nonstationary Maxwell equations as a superposition of vortex and potential fields was discussed at the Moscow Electrodynamic Seminar. Usually, application of this representation is justified by referring to the Helmholtz theorem without discussing its applicability conditions. It has been shown that the applicability conditions of the Helmholtz theorem are not fulfilled for nonstationary fields. In this report, an approach to establishing a relation between the structures of exterior sources and the structures of the electromagnetic field excited by these sources, which is based on the analysis of the continuity equation for exterior sources from the viewpoint of the set theory, is proposed. A classification of the structures of exterior sources and fields excited by these sources, including static, stationary, and nonstationary fields, is proposed.


    Tuesday
    , June 3,  2014 , 15:00 (3:00 p.m.) - Session 3 in 2014
     
    1.  Waves in electrical circuits

    Author:  A. V. Samsonov (Murom Branch of the Vladimir State University, Russia) ,  (45 min + 15 min for Q&A)
    Abstract:   Some relations between longitudinal waves of the electric field and transverse waves of magnetic field, as well as some relations between the indicated waves and their sources are theoretically justified.

    2.  Analysis of some experimental results on the "longitudinal" electromagnetic waves from the viewpoint of the classical electromagnetic theory

    Author:  V. A. Permyakov   (Moscow Power Engineering Institute (National Research University), , Russia) ,  (45 min + 15 min for Q&A)
    Abstract:  In the last decades there have been carried out some experiments, the results of which are considered to be a proof of the existence of the "longitudinal" electromagnetic waves (LEMWs). According to their authors, the description of the experiments is impossible in the frame of the classical theory and therefore it requires generalization of the Maxwell equations. However the study of those works shows that they don't comprise any comparisons of the experimental results to theoretical calculations performed according to the classical theory. Therefore, the claims of the existence of the LEMWs are not justified. As an example, we carry out the analysis of the works on radiation of a spherical antenna above the planar earth surface as well as on propagation of the EMWs between two horizontal dipoles arranged on the same axis under the water surface. It is shown that the experimental data can be explained in the frame of the classical electromagnetic theory.

     

    Tuesday,  April 01,  2014 , 15:00 (3:00 p.m.) - Session 2 in 2014 
    1.  Various bases applied for the solution of the problem of diffraction by open screens

    Author:  S. A. Manenkov  (Moscow Technical University of Communications and Informatics (MTUCI), Russia) ,  (45 min + 15 min for Q&A)
    Abstract:  Three approaches based on the method of extended boundary conditions are developed for the solution of the problem of diffraction of a plane wave by open thin screens. It is shown that the proposed algorithms make it possible to calculate the wave field for screens of arbitrary shapes. The developed methods are compared in accuracy and computation speed.

    2.  Fine-laminated medium of finite thickness

    Author:   R. L. Evelson  (Moscow , Russia) ,  (45 min + 15 min for Q&A)
    Abstract:  In accordance with the needs of nanotechnologies, it is shown that the general solution of the complex Maxwell's equations for an inhomogeneous isotropic periodic fine-laminated medium consisting of two different alternating thin isotropic planar layers at any wavelength coincides with a general solution of the Maxwell's equations for an homogeneous anisotropic medium in the form of single-axis magneto-dielectric crystal of the same thickness as the initial inhomogeneous medium.

    3.  Discussion on the theme


    Tuesday
    , February 4,  2014 , 15:00 (3:00 p.m.) - Session 1 in 2014
     
    1.  Communications in the sea water based on conduction currents: experience, problems, perspectives

    Author:   V. M. Olshansky  (A. N. Severtsov’s Institute of Ecology and Evolution, RAS , Moscow, Russia) ,  (45 min + 15 min for Q&A)
    Abstract:  On the basis of the electromagnetic propagation equations for the case of a dipole in conducting media there offered the assessment of dipole antennas effectiveness and optimization methods, showed the structure of fields, discussed the radiation patterns and ways to ensure omnidirectional radiation, given estimates of the communication range and the results of experiments and examples of practical design. Although the communication range and information rate increase significantly when approaching the receiving and transmitting antenna to the ocean surface, especially in the cases of small depth near the shore, the focus of the report will be given to the occasion due to great depths, when the influence of the surface can be neglected. This case is not considered much in the professional electrodynamical literature, especially in Russian one. The author will try to explain why the terms «near zone» and “quasi-static zone” for this case seems to be incorrect.
    2.  Discussion on the theme
     

    Tuesday, December 3, 2013 , 15:00 (3:00 p.m.) - Session 5 in 2013 

    1.  Surface electromagnetic waves guided by planar boundaries of highly conductive media -  Zenneck wave

    Author:   V. V. Shevchenko 
     
    (Kotel'nikov Institute of Radio-engineering and Electronics of  RAS , Moscow, Russia) ,  (45 min + 15 min for Q&A)

    Abstract:  The properties of a theoretical model of surface electromagnetic waves guided by planar boundaries of highly conductive media such as metals, humid soils, sea and salty water in general are considered. The phase, group, and energy flow velocities of these waves are calculated. These waves are related to the unusual type of waves, the Ôroup velocity of which is differed from the energy flow velocity, that is the velocity of wave energy transport.  Although depending on the medium parameters, the phase and Ô group velocities of these waves can be higher than the velocity of light, their energy flow velocity is always lower than the velocity of light. The so-called Zenneck wave is related to the considered type of waves.
     

    2.  Surface electromagnetic waves - Experimental confirmation of the Sommerfeld-Zenneck theory

    Author:  V. N. Datsko 
     
    ( Moscow Institute of Electronic Technology, Moscow Region,  Russia) ,  (45 min + 15 min for Q&A)

    Abstract:  At the beginning of the 20th century, surface electromagnetic waves (SEV) were predicted by German scientists A. Sommerfeld and D. Zennek. But their findings were disputed by the world experts, and the surface waves could not be found in large-scale field experiments carried out in various countries. By the middle of the 20th century there was formed a strong opinion of non-existence of the SEV (except for surface acoustic waves). However, in the 60 's, some theoretical works on the SEV appeared, of which the most substantial ones were published in the USSR. In 70-80s the group┬» of experimenters in Mendeleyevo, Moscow Region, investigated the SEV in a long-term series of laboratory experiments including the SEV in salty water of different concentration, in gas and semiconductor plasma, as well as in metals. The experiments confirmed the base properties of the surface electromagnetic waves predicted by Sommerfeld and Zennek.


    Tuesday, November 5, 2013 , 15:00 (3:00 p.m.) - Session 4 in 2013 

    1.  Application of orthogonal expansions in the antenna and photonic technology
     

    Author: -   V. I. Gusevsky
     
    (Design Bureau of the Moscow Power Engineering Institute, Russia) ,  (45 min + 15 min for Q&A)

    Abstract:  Author considers a new approach to the application of orthogonal expansions of electromagnetic fields in linear and planar antenna apertures of arbitrary shape and with amplitude distribution of general form.
                    The main feature of this method is that a positive function of the amplitude distribution of the main polarization component of the field within the antenna aperture is used as a weight function that generates a sequence of orthogonal functions.
                    In this case, the phase field perturbations are described by orthogonal harmonics, which acquire the properties of eigen functions of an integral operator, transforming the set of the orthogonal field harmonic in the antenna aperture into many antenna patterns in the far zone.
                    It is shown that this approach has allowed solving a number of new problems of the antenna technology. In particular, there have been realized the procedure of electoral suppression (or increase) of the level of the specified side lobes of the antenna pattern in the far zone. Through the formation of sector deeps the problem of suppression of the broadband noise is solved. There is solved the problem of minimization of the slope of the phase characteristic of the main lobe of the antenna pattern. A way to control the shape of the antenna pattern in the reflector antennas with passive scatterers is proposed.
     

    Tuesday, October 1,  2013, 15:00 (3:00 p.m.) - Session 3 in 2013 

    1.  Effectiveness of using non-coupled large-aperture radiators in phased array antennas
     

    Author: -  S. P. Skobelev
     
     Company "Radiophyzika", Moscow, Russia ,  (25 min + 15 min for Q&A)

    Abstract:  Quantitative analysis of effectiveness of using non-coupled large-aperture radiating elements in planar singly and doubly periodic phased antenna arrays is carried out. The indicated effectiveness is defined as a ratio of the minimum number of elements necessary for satisfying requirements specified for the array gain within a specified field of view to the actual number of the large-aperture elements. It is shown that in each case there exists an optimal relation of the actual array element spacing to the maximum possible element spacing corresponding to the specified field-of-view width providing maximum of element use effectiveness. It is found that a higher (by 4-to-5%) effectiveness is achieved when using apertures with tapered amplitude distributions.
     

    2.  A model of an infinite traveling wave array in the form of Floquet waveguide
     

    Authors: -  S. E. Bankov, M. D. Duplenkova  
    Kotelnikov Institute of Radio Electronics of Russian Academy of Sciences, Moscow  (45 min + 15 min for Q&A)

    Abstract: A new approach for modeling of infinite traveling wave arrays is proposed. This approach allows one to simulate infinite traveling wave array with help of Floquet waveguide that is a standard tool of modern systems of electromagnetic design.
     

    3.  Calculation of reflector parabolic antennas using contemporary microwave CAD software
     

    Authors: -  A. A. Kurushin (1), E. I. Lavretskij (2), S. E. Chadov (1)
     
     1 - Research University "MPEI", Moscow, 2 - Design Bureau "Kompas", Moscow,   (20 min + 15 min for Q&A)

     

    Tuesday, April 2,  2013, 15:00 (3:00 p.m.) - Session 2 in 2013 

    1.  Solution of applied problems about excitation of electromagnetic waves in 2D dielectric structures on the basis of the method of surface integral equations
     

    Author: -  A. A. Komarov (Moscow Power Engineering Institute, Russia)  (45 min + 15 min for Q&A)

    Abstract:  In papers by E. N. Vasil'ev and V. V. Solodukhov, the method of surface integral equation is implemented to solve a very large class of diffraction problems for 2D bodies. Further development of the indicated method for 2D bodies excited by finite sources are presented. Dyadic Green's function in generalized cylindrical coordinates is build. The problem of radiation and coupling between axial slots located on a perfect electric conducting cylinder in a dielectric region of arbitrary shape is solved. Numerical analysis of electromagnetic scattering by a right-angled dielectric wedge is considered in detail. Phase characteristics of surface currents and scattered fields are studied for the first time.
     

    Tuesday, March 5,  2013, 15:00 (3:00 p.m.) - Session 1 in 2013 

    1.  Design of Multibeam Offset Dual-Reflector Antennas with One-Dimensional and Two-Dimensional Scanning  

    Authors: - A. N. Plastikov and B. L. Kogan (Moscow Power Engineering Institute, Russia)  (45 min + 15 min for Q&A)
    Abstract:  Two types of multi-beam offset dual-reflector antennas (MBRAs) are considered. Calculated characteristics of  bifocal antennas and antennas with classical surfaces with nonconventional optical design are presented. A novel procedure for designing of three-dimensional offset bifocal reflector antennas (BFRAs) is described and its relationship with the ideology of design proposed in the works by Boris E. Kinber and Carey M. Rappaport is discussed. The procedure for estimation and optimization of the efficiency of multi-beam BFRAs with a wide field of view is described. As an example, four BFRAs designs are presented. One of them has a50┬░ field of view and a directivity of higher than50 dB. As the MBRAs withtwo-dimensional scanning, two types of  classical offset Dragonian reflector antennas with circular apertures are investigated.
     

    2.  Radiation and Reception of Surface Electromagnetic Wawes

    Authors: - V. N. Datsko (National Research University of Electronic Technology, Moscow, Russia)  (45 min + 15 min for Q&A)
    Abstract:  It is shown that a point dipole is not an effective emitter of surface waves. A technique is developed and an experiment is carried out for estimating the effectiveness of the surface wave excitation on salt water by various antennas. It is found that the maximum effectiveness is achieved by using resonator and conical antennas.

     

  1. [To Main Page]

     

    Seminar Secretary:   Dr. Mikhail Vesnik